Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors.
Distinguishing Lead and Molecule States in Graphene-Based Single-Electron Transistors.
复制标题
DOI：
10.1021/acsnano.7b00570
复制
发表时间：
2017-06-27
期刊：
影响因子：
17.1
通讯作者：
Mol JA
中科院分区：
文献类型：
--
作者：
Gehring P;Sowa JK;Cremers J;Wu Q;Sadeghi H;Sheng Y;Warner JH;Lambert CJ;Briggs GAD;Mol JA
石墨烯为接触单个分子提供了一个二维平台，这使得分子轨道，自旋和振动状态的传输光谱成为可能。在这里，我们报告单电子隧穿通过分子已被锚定到两个石墨烯引线。石墨烯引线内的量子干涉引起能量依赖的传输和连续隧道速率的波动。铅态通过全局背栅进行静电调谐，从而在测量的电导图中产生不同强度的独特图案。这种模式可能会掩盖正在研究的分子固有的运输功能。使用系综平均磁导测量，铅和分子的状态被解开，使单分子的光谱研究。
Graphene provides a two-dimensional platform for contacting individual molecules, which enables transport spectroscopy of molecular orbital, spin, and vibrational states. Here we report single-electron tunneling through a molecule that has been anchored to two graphene leads. Quantum interference within the graphene leads gives rise to an energy-dependent transmission and fluctuations in the sequential tunnel-rates. The lead states are electrostatically tuned by a global back-gate, resulting in a distinct pattern of varying intensity in the measured conductance maps. This pattern could potentially obscure transport features that are intrinsic to the molecule under investigation. Using ensemble averaged magneto-conductance measurements, lead and molecule states are disentangled, enabling spectroscopic investigation of the single molecule.